If you listen to the news, it's hard not to get depressed about how awful things are in the world - war, famine, poverty, ecological disaster, climate change, pollution, global warming, etc etc.
But this book shows that actually, and perhaps counter-intuitively, things are actually getting steadily better in the world as a whole.
For more people, in more places, the indicators of improvement are gradually consolidating and growing - the defeat of childhood diseases, life expectancy and longevity, family incomes, standards of education, travel, growth of democracy or electoral freedom, life choices, and so on.
Each chapter gives statistics and references, and seems to be very thorough. The graphics are easy to understand.
No doubt the book is written from a right-wing-ish point of view, but it's a good antidote to the relentless gloom and doom of the media, which can only survive on bad news and disaster. It does not gloss over the difficulties still faced by too many people, but it provides a viewpoint over time, and not just responding to each crisis or peril as it happens.
In some ways, this is a rather shocking book. There is such a clumpish mass of received opinion about what's wrong in the world, and I have found it is quite hard to challenge the set views about it all, but this book attempts to do that.
It does not say things are 'good' or even 'good enough' but it does say things are getting better - for lots of people, in lots of ways, in lots of places.
I found it an invigorating read, and I wish I had bought it as a 3D version, and not on Kindle, where the whole footnote/indexing/referencing systems are so clunky.